Re: Tungsten gap erosion

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "brian by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ka1bbg1-at-mcttelecom-dot-com>

Terry,coilers, i have a rash of 1/8 diameter round tungsten carbide(were
drills till they broke) and yes most carbide can be silver soldered. Terry
i can tell you where the carbide comes from. brian f.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, August 10, 2001 6:42 PM
Subject: Tungsten gap erosion


> Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
>
> Hi All,
>
> In a triggered spark gap.  There is no spinning rotor or bunch of copper
> sections to help cool the gap.  So I was thinking of just two water cooled
> 1/8 inch tungsten electrodes.  No fan or anything else.  Just the tungsten
> tips thermally linked to a water jacket with heavy copper mounting.
> Although no tungsten tips yet, sort of along the lines of:
>
> http://hot-streamer-dot-com/temp/ProtoSTSG.jpg
>
> I was wondering how fast the tungsten tips may erode or wear out with say
a
> 900 watt coil.  They would stay cool (if 300C is cool :-)) but 120 times
> per second, they would be firing without too much air circulation.
>
> Just in idea I am working on and searching for tips ;-))
>
> I like to avoid fans since they tend to be battery powered to avoid
> worrying with another AC line going to the coil area...
>
> Also, can tungsten and/or tungsten carbide be soldered or brazed?  I note
> tool bits and blades have tungsten tips that look brazed but I did not
know
> if that was something a regular guy could do with a torch?
>
> I hope to get some testing done with Marc's electrodes and some of this
> triggered gap stuff this weekend :-))  Also thinking along the lines of a
> really reliable long life gap for Ted's coil.
>
> Cheers,
>
> Terry
>
>
>